Largely manufactured from recycled glass (e.g. windscreens) and mineral base materials such as sand and without the use of binding agents. The ingredients are melted into molten glass, which is cooled and crushed into a fine powder. The powdered glass is poured into molds and heated (below the melting point) in a "sintering" process that causes the particles to adhere to one another. Next, a small amount of finely ground carbon-black is added and the material is heated in a "cellulation" process. Here, the carbon reacts with oxygen, creating carbon dioxide, which creates the insulating bubbles in the (material). CO2 accounts for more than 99% of the gas in the cellular spaces.
Cellulose insulation is a material made from recycled newspaper. The paper is shredded and inorganic salts, such as boric acid, are added for resistance to fire, mould, insects and vermin. The insulation is installed either blown or damp-sprayed depending on application.
Wood fibre
The success of wood fibre insulation derives from an attractive environmental profile combined with a whole bag of functions including rigid insulation, sheathing and sarking for timber frames, roofs and flooring as well as flexible insulation for studs and rafters.
Wood of course is renewable, it sequesters carbon during its growth and product production is relatively free from pollution. The insulation value of wood fibre boards is not as dimensionally efficient as some of the orthodox petro-chemical materials - but it's no slouch either - typically coming in with a 'k value' range of between 0.038-0.043 W/mK depending on format.
Hemp
Hemp fibres are produced from hemp straw of the hemp plant. Most hemp is imported, but an increasing amount of home-grown crop is becoming available. Hemp grows up to a height of nearly 4 metres within a period of 100-120 days. Because the plants shade the soil, no chemical protection or toxic additives are required for hemp cultivation. The product is composed of, usually, 85% hemp fibre with the ballance made up of polyester binding and 3-5% soda added for fire proofing.
Straw
Straw is an agricultural by-product, the dry stalks of cereal plants, after the grain and chaff have been removed. Straw makes up about half of the yield of cereal crops such asbarley, oats, rice, rye and wheat.
Impact plasterboard goes by many names such as 'security panel' or 'impact panel' that is a specially toughened wallboard with greater than the standard resistance to mechanical damage - scratches, dents. Made from gypsum reinforced with wood fibre, it is stronger and harder than other plasterboards giving greater impact and pull out resistances. It is used in areas of high footfall such as schools, hospital, hallways, playrooms, offices and places with high levels of wear and tear and potential impact damage.
Board durability, strength and load bearing capacity are improved by its high density and the inclusion of various additives. In fact they are able to support weights of up to 15kg per fixing and are installed in the same way as standard plasterboard. A good quality impact plasterboards should be impact rated in accordance with BS 5234: Part 2: 1992 Annexes B, C, D and E.
Impact plasterboards come in blue colour either in standard length 2400mm or 3000mmm extended version. Its density is approx. 278kg/m3 higher than standard wallboard. Panels available sizes are 12.5mm or 15mm and are widely associated with brands such as Knauf (impact panel) or British Gypsum (Gyproc Rigidur H) or Knauf (Knauf Performance Plus). Its price often depends on the supplier location near your project. As of 2022 the average cost of impact resistance plasterboard is £25.80 per 8x4 size board which results in £8.96 per m2.
Siniat Weather Defence External Sheathing Board 12.5mm x 1200mm x 2400mm is a strong, moisture resistant A1 non-combustible exterior sheathing board faced with water repellent material that is compliant for structures above 18m in height.
Weather Defence™ is a revolutionary facade external sheath..
12.5mm Siniat Weather Defence™ (A1 Non-combustible) 3000mm x 1200mm is an External Sheathing Board used for external sheathing applications in steel or timber frame construction with rainscreen, insulated render, brick or block facade systems.
Weather Defence Siniat is a revolutionary facade exte..
12.5mm Siniat GTEC Weather Defence™
Siniat Façade Board Class ‘0’ to UK Building Regulations
Fire classification: A1 Non-combustible (Fire Rated Board)
3000mm x 1200mm x 12.5mm External Sheathing Board
Strong, compliant for structures above 18m in height